General C++ Programming - C++ Forum

#include <iostream> #include <iomanip> using namespace std; int main() { int i, row_nr; cin >> row_nr; for (i = 1; i <= row_nr; i++)...

[2 replies] Last: I want this code to give the result 1 4 7 2 5 8 3 6 9 now it gives m... (by Mr potato19)

by aaronpeart

Delimiter not working

For a project I have to pass data from a file into an HTML code. The delimiter is not working (\t) instead of selecting all data between tabs, it selects only s...

[9 replies] Last: No sweat. Good luck! (by tpb)

by Kaylaplusplus

Counting vowels from a text file

I think my counting is fine and solid, but I'm still new to importing text from files. If someone could point out and explain what needs to be change that would...

[1 reply] : The name of the language is C++ and yet you still write C += 1 !? Wha... (by tpb)

by Jack Lalane

MUD (reading in txt file)

I'll probably have more questions later on but I know I need some kind of loop to read in the particular things in the txt file, I just don't know how its suppo...

[1 reply] : What is the "javascript:tx" about? Post the first 50 lines of that fi... (by tpb)

by hassanAman

Calling Contructor With Params outside function scope

This thing wont let me compile : class Foo{ public: Foo(); ~Foo(); private: Bar b(0, 0); // this ...

[1 reply] : * What compiler are you using? * What's the definition of Bar? * What'... (by helios)

by Dolphin12

to_string error

I am writing a code and I am getting an error of to_string was not declared in this scope. Does anyone have any idea how to fix this? string my_to_string(){ ...

[16 replies] Last: I'm not sure what you mean. You have to create the input file if you w... (by Ganado)

by closed account LhRjy60M

arrays

Help with arrays

[3 replies] Last: It's critical to indent your code so that it matches the actual block ... (by dhayden)

by closed account LhRjy60M

This is for a hotel system but i cant seem to get it to work

N/A

[1 reply] : 29: drop the void 41: You are trying to define a function inside anoth... (by Repeater)

by Mahmoud899

Permutations with specified sample space

I have 10 objects and I want to choose 5 from these objects and repetition is allowed. The permutation equation for that is 10!/(10-5)! which will give me all t...

[4 replies] Last: #include <iostream> #include <vector> #include <string> using namesp... (by lastchance)

by Mr potato19

Matrix

#include <iostream> #include <iomanip> using namespace std; int main() { int i, rows = 0, row_nr; cin >> row_nr; for (i = 1; i <= 9; i++) { ...

[1 reply] : your loop boils down to: for i = 1 to 9 cout i with an end of line e... (by jonnin)

by stav

constexptr to calculate something at compiletime

Hi I looked up a way to check the endianness of the system and found this snippet of code: bool is_big_endian() { union { uint32_t i; cha...

[1 reply] : Will it then calculate the endianness at compile time? instead of run... (by Ganado)

by Mr potato19

Flipped numbers Print out some numbers

CAN SOMEONE HELP ME WITH THIS? User inputs an integer N from the range from 1 to 30. Write a program to display the numbers from 1 to N*N in a table with...

[3 replies] Last: Your code has an array that has 3 rows and 3 columns. Your loops, howe... (by keskiverto)

by Mr potato19

Overlap percentage

On XY plane, you are given upper left corner coordinates of two equal sized rectangles. Find the intersection percentage of the rectangles. Question: Write a...

[2 replies] Last: All that I wrote in your first thread http://www.cplusplus.com/forum/g... (by keskiverto)

by Mr potato19

Counting magic numbers

This is the revised version of the problem. Resubmit your work here. Given two integers N and K, such that N>0 and N>K, count those numbers from the range o...

[1 reply] : All that I wrote in your first thread http://www.cplusplus.com/forum/g... (by keskiverto)

by Foxydf

Table Access

I am wanting to create a table of iRval and rs values so if a key corresponding to iRval is pressed the an answer of rs is given instead of all these if stateme...

[1 reply] : One idea is to use std::map. http://thispointer.com/stdmap-tutorial-pa... (by Thomas1965)

by louish

do while loop needs help.

Need help with it. The while loop for play again doesn't work. I am not sure what is the reason that caused the error, any suggestion will be helped. The ide...

[4 replies] Last: Duplicate of http://www.cplusplus.com/forum/beginner/234497/ . Please... (by MikeyBoy)

by lake0829

C2601

I am working with the following pseudocode: Using the pseudocode below, write the code that will meet the requirements. Declare constants SIZE and MIN Functio...

[4 replies] Last: http://www.cplusplus.com/reference/cstring/strlen/ (by MikeyBoy)

by macXnXcheese117

Function to convert lowercase s to uppercase in string(without #<algorithm>)

So I need to write a function to convert all lowercase character s's to uppercase and leave all other characters unchanged. Then return the transformed string. ...

[1 reply] : You can just use a for loop and use islower and toupper. #include <cct... (by Thomas1965)

by nonus

Assistance with looping variances

Hello, I am trying to write a program that does sum, total & average, along with comparing numbers of being the highest and lowest. I've succeeded in do so, but...

[1 reply] : indent your code > but I'm having problems doing the Do-While. ¿wha... (by ne555)

by Cambalinho

when and why use explicit?

i'm sorry, but i fill much more confused :( what is explicit and when use it? i read some information and i tested, but i'm felling more confused :(

[5 replies] Last: thank you so much for all to all. now i understand more about explicit... (by Cambalinho)

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General C++ Programming - April 2018 (Page 14)